W83L784R
Preliminary
2. FEATURES
2.1 Monitoring Items
• 2 thermal inputs from remote thermistors or 2N3904 NPN-type transistors or PentiumTM II
(Deschutes) thermal diode output
• One on-chip temperature detection
• 4 voltage inputs
--- typical for Vcore, +3.3V, +5V, Battery
• 2 sets of fan speed control and fan speed monitoring input
• WATCHDOG comparison of all monitored values
• Programmable hysteresis and setting points (alarm thresholds) for all monitored items
2.2 Actions Enabling
• Issue fan fault signal as fans are abnomally stopped
• Issue battery low signal as bettery voltage is abnomally out of range
• 2 PWM (pulse width modulation) outputs for fan speed control to support } Thermal CruiseTM ~ or
} Speed CruiseTM ~
--- Automatically maintain the CPU or system in the specific temperature or keep the fans in the
specific speed under the H/W control
• Issue SMI#, OVT#, GPO to activate system protection
• PWR_DN# setting for the Power down mode
• Warning signal pop-up in application software
2.3 Power Good
• Issue RESET# outputs as the Power Good signal when 3V and 5V rise across a reset threshold.
2.4 General
• I2CTM serial bus interface
• IntelTM LDCM (DMI driver 2.0) support
• AcerTM ADM (DMI driver 2.0) support
• Winbond hardware monitoring application software (Hardware DoctorTM ) support, for both
Windows 95/98
• Meet WfM 2.0 (Wired for Management) spec.
• 5V Vcc operation
2.5 Package
• 20-pin SSOP (209mil)
Confidential, For Beta-site Only
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Publication Release Date: Sep.
1999
Revision 0.54